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 Mon, 23 Mar 2020 13:32:54 +0300 (MSK)
Date: Mon, 23 Mar 2020 10:32:53 +0000
From: Nikita Pettik <korablev@tarantool.org>
Message-ID: <20200323103253.GA25473@tarantool.org>
References: <20200323072444.24660-1-gorcunov@gmail.com>
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In-Reply-To: <20200323072444.24660-1-gorcunov@gmail.com>
Subject: Re: [Tarantool-patches] [PATCH] popen: add missing ev_io
	initialization
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To: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: tml <tarantool-patches@dev.tarantool.org>

On 23 Mar 10:24, Cyrill Gorcunov wrote:
> Otherwise it left unitialized and in result
> may not work depending on dirty data got from
> memory.
> 
> Fixes #4811
> 
> Reported-by: Nikita Pettik <korablev@tarantool.org>
> Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
> ---

Hi,

Applying the patch does not fix the problem, but reproduce it
each time unit/ suite is executed :)

> branch gorcunov/gh-4811-popen-coio
> 
>  src/lib/core/popen.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/src/lib/core/popen.c b/src/lib/core/popen.c
> index a0630e3d9..99bd69b74 100644
> --- a/src/lib/core/popen.c
> +++ b/src/lib/core/popen.c
> @@ -115,12 +115,8 @@ handle_new(struct popen_opts *opts)
>  
>  	rlist_create(&handle->list);
>  
> -	/*
> -	 * No need to initialize the whole ios structure,
> -	 * just set fd value to mark as unused.
> -	 */
>  	for (i = 0; i < lengthof(handle->ios); i++)
> -		handle->ios[i].fd = -1;
> +		coio_create(&handle->ios[i], -1);
>  
>  	say_debug("popen: alloc handle %p command '%s' flags %#x",
>  		  handle, handle->command, opts->flags);
> 
> 2.20.1
>